All Questions
Tagged with structural-engineering reinforced-concrete
44
questions
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Find out the loads acting per unit length on the beams supporting an open well stair
Please see the attached picture.
I want to find out the dead load per unit length and live load per unit length (both in kN/m), that will be acting on the floor beam (300 mm × 450 mm) and the landing ...
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1
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USD beam to support ultimate moment of 650kN-m, limited to an effective depth of 600mm and 300mm width. Effective depth for compression steel is 60mm
I don't understand how exactly can a beam as described can support a 650kN-m ultimate moment. The only allowed bars are 28mm∅ bars. Consider 40mm side covering and bar spacing to be greater or equal ...
- 1
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147
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Bending moment capacity of T-cross-section (reinforced concrete)
I have a question regarding a simplification/derivation of the (ULS) bending moment capacity of a given T-cross-section, with compression-zone on the flanged side. The problem is that the rebar-strain ...
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2
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544
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What does$ Ast = N16 @ 175mm $centres means in designing reinforced concrete?
I have the following problem, which I already know the general steps into solving.
My general approach is: calculate I cracked as we are already told that the section is cracked, and then finally use ...
- 286
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3
answers
240
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TMT Steel in layers
The Site Engineer and I were arguing about the placement of the reinforcement bars in layers. The Steel technician (TMT) placed the third layer of reinforcement in the 2nd layer. I said it didn't ...
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291
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What is the cause of this cracking pattern in a simply supported beam?
Background
On May 5th 2022, a bridge was struck in Brantford, Ontario, Canada by a commercial vehicle. This vehicle struck a reinforced concrete protection beam placed on the on-coming side for the ...
- 1,221
2
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1
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308
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How do hooks/bends cause bearing stresses in reinforced concrete?
Can someone please explain the exact mechanics of development of bearing stresses in concrete on account of bending of steel reinforcement and/or providing of hooks at the beam-column junction for ...
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2
answers
80
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Can anyone help me with the concept of bearing stresses in steel reinforcement in Reinforced Concrete?
When there is tension reinforcement(steel) embedded in concrete, does it not also undergo bearing stresses on account of the weight of the concrete and other forces which are acting above the steel? ...
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1
answer
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Is it safe to slightly cut the edge of RCC column for passage of pipe in bathroom?
The RCC column was cut in my absence due to passage of pipe for bathroom fittings. The thickness is about 1.5 in. Will it hamper the stability of structure?
4
votes
2
answers
284
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The design of precast concrete-- are they the same with cast-in situ design?
I am curious as to how different is precast concrete design than conventional cast-in situ reinforced concrete design as far as structural engineering is concerned.
To my mind, they should be the ...
- 1,264
2
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1
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73
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Are the design load values in this floor determination table (span chart) inclusive or exclusive of the given floor weight (inherent dead load)?
So, I have been doing research into the use of Insulated Composite Concrete Forms (ICCFs) for small-scale construction, and that has led me to looking at the Rastra ICCF system, as it has been in ...
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2
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211
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Dependency between load capacity for reinforced concrete slab and thickness
How does the load capacity for a reinforced concrete slab depend on the thickness of the slab?
Example:
Let's suppose that we have the following constants:
concrete quality (including the maximum ...
- 153
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3
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200
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Why not a reverse bending in the slab?
When I'm looking at images / videos about the load supported by reinforced concrete slabs, I always see a compression at the top of the slab in every point that varies from the center to the edges:
...
- 153
1
vote
2
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217
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Reinforced mesh at different distance in a concrete slab?
Trying to determine some information regarding the reinforced concrete slabs (reinforced with mesh) in an apartment, by looking through the holes in the middle of the rooms for lights, I've come ...
- 153
1
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3
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134
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Does screed increase the slab tension capacity?
Does a screed applied over the slab increase the slab tension capacity?
Somehow it's counter intuitive because adding weight on the slab should tension it, but do the slab and the screed behave as a ...
- 153